34results about How to "Reduce Radiation Risk" patented technology

The invention relates to the technical field of CT (computed tomography) system parameter calibration, in particular to a C-arm system rotational angle calibration device and a C-arm system calibration method; the C-arm system rotational angle calibration device comprises a motion conversion component, a displacement sensor, a data transmitter and a processor, the motion conversion component is arranged to connect with a C-arm and convert rotational motion of the C-arm into linear motion, the displacement sensor is connected with the motion conversion component and is arranged to acquire a displacement signal of the motion conversion component and transmit the displacement signal to the data transmitter connected with the displacement sensor, and the processor is connected with the data transmitter and is arranged to receive and analyze the displacement signal transmitted by the data transmitter. The C-arm system rotational angle calibration device is simple to operate, good in operational stability and reliability, and free of X-ray exposure in use, so that the radiation risk can be lowered.

The invention discloses a microwave heating treatment system for high-radioactivity nuclear industry waste, and relates to the technical field of treatment of the high-radioactivity nuclear industry waste. The microwave heating treatment system comprises a sealing box and a control system. A microwave heating hole is formed in the top of the sealing box. A lifting device is arranged below the microwave heating hole. A sealing door is arranged on the sealing box. A first conveyor for feeding or taking a barrel containing high-radioactivity waste liquid to or away from the lifting device is arranged in the sealing box. A second conveyor is arranged on the outer portion of the sealing box. The control system comprises a touch screen and a PLC (programmable logic controller) electrically connected with the touch screen. The PLC is connected with the first conveyor, the second conveyor, the microwave heating hole and the lifting device electrically. The microwave heating treatment system has the advantages that automatic delivering, sealing, and microwave heating and evaporating of the barreled high-radioactivity waste liquid are realized, the whole process does not need manual on-siteoperations, and no high-radioactivity waste liquid exists on an equipment maintenance site, so that working efficiency is improved, and the risk that operators are radiated is reduced.

The invention discloses a low-dose CT tooth image denoising method based on a double-residual network, and the method comprises the steps: firstly training an auxiliary network, and storing a model; and calculating a loss function value by utilizing a similarity relationship between the feature space diagrams extracted by the double-residual network, and updating parameters by combining the loss function value between the denoising network and the double-residual network so as to assist the training of the denoising network. The method mainly comprises a data loading module, an auxiliary network training module, a double-residual network denoising module and a testing module. The low-dose CT tooth image denoising method has a remarkable effect on low-dose CT tooth image denoising, can reserve some detail features of the image, and has important application value.

The invention belongs to the technical field of high-radioactive nuclear industry waste microwave heating treatment and particularly relates to high-radioactive nuclear industry waste microwave heating treatment equipment with an aim to solve problems that in a microwave heating device, high-radioactive liquid waste usually contains more solid waste resulting in proneness to pipe clogging, influence of process efficiency and increasing of radiation risks in the prior art. The technical scheme includes that the high-radioactive nuclear industry waste microwave heating treatment equipment comprises a sealed box, a microwave heating hole is arranged in the top of the sealed box, a lifting device is arranged under the microwave heating hole, a sealing door is arranged on the sealed box, a first conveying device used for conveying a barrel containing high-radioactive liquid waste to the lifting device or away form the same is arranged n the sealed box, a second conveying device is arrangedon the outside of the sealed box, and the first conveying device and the second conveying device are matched in height and are respectively located on two sides of the sealing door. The high-radioactive nuclear industry waste microwave heating treatment equipment is applied to microwave evaporation of the high-radioactive liquid waste.

The invention discloses a method for reducing the radiation of an X-ray detection environment. The method comprises the following steps: S1, setting an X-ray shielding structure at an X-ray generationdevice, wherein the X-ray shielding structure shields an X-ray bulb tube, and X-rays emitted by the X-ray bulb tube are ejected from an ejection port of the X-ray generation device; S2, a receiving end: setting a protective medium and a first shielding plate on a detected person, wherein a detected person is located between the protective medium and the first shielding plate and the protective medium covers a detected part of the detected person, and setting an X-ray digital detector used for imaging between the detected person and the first shielding plate, wherein the protective medium is arranged between the X-ray generating device and the detected part; and S3, an operation end: setting a second shielding plate between the operator and the X-ray generation device. According to the invention, the X-ray radiation in the environment is greatly reduced, so that the problem of X-ray radiation in special scenes such as a non-protection room and the like is solved.

The invention discloses a radiation dose rate measurement system based on a high-purity germanium detector. The radiation dose rate measurement system comprises a measurement unit, a simulation unit, a comparative analysis unit and a data processing unit, the measurement unit is used for performing an energy spectrum measurement experiment on the energy spectrum of the radiation source to obtain a real energy spectrum of the radiation source; the simulation unit is used for carrying out Monte Carlo simulation on the energy spectrum measurement experiment to obtain a simulation energy spectrum of the radiation source, and the simulation unit also simulates the radiation source under different energies based on the Monte Carlo simulation experiment after parameter optimization to obtain a continuous energy spectrum of the radiation source; the comparative analysis unit is used for comparing and analyzing the real energy spectrum and the simulated energy spectrum, and performing parameter optimization on the Monte Carlo simulation experiment; and the data processing unit is used for performing energy spectrum dose conversion according to the continuous energy spectrum and obtaining the radiation dose rate based on the energy spectrum dose conversion. The energy spectrum-dose conversion function can be accurately obtained by measuring the energy spectrum of the radiation source and combining the Monte Carlo simulation technology, and then the radiation dose rate is obtained.

The invention discloses a functional modular plutonium contaminated soil ex-situ leaching decontamination method. According to the invention, a contaminated soil particle size grading and analysis module, a contaminated soil screening and volume reduction pretreatment module, a contaminated soil grading leaching decontamination module and a waste liquid treatment and recycling module are included. According to the method, on the basis of particle size grading and analysis of the contaminated soil, mass volume reduction of the contaminated soil and reduction of comprehensive decontamination cost are preliminarily achieved through screening pretreatment, grading leaching decontamination is conducted on the remaining part, the content of plutonium-239 in the contaminated soil is reduced to 3700 Bq/kg or below 100 Bq/kg, then waste liquid generated in the leaching process is treated, and exempt emission or reuse of the waste liquid is achieved. Compared with the prior art, the process is constructed in a function modularization mode, optimization of subsequent core technical parameters and construction of matched technical equipment are guided, all modules can be disassembled, matched and integrated according to specific requirements, and then the flexibility of process operation is improved.

The invention discloses a radiotherapy X-ray source and an X-ray source device, and relates to the technical field of radiotherapy. The radiotherapy X-ray source comprises a substrate; a cold cathodeelectron emission source disposed on the substrate; an anode transmission target disposed opposite to the cold cathode electron emission source, wherein an electric field can be applied between the anode transmission target and the substrate; and a filter disposed on a side of the anode transmission target away from the cold cathode electron emission source. The substrate, the cold cathode electron emission source, the anode transmission target, and the filter are encapsulated in a vacuum chamber. The X-ray source device uses the radiotherapy X-ray source, and further includes a focusing lensand a beam limiter. Compared with the prior art, the radiotherapy X-ray source provided by the invention has electron escape through the cold cathode field emission, does not need to preheat a cathodematerial, and has low power consumption. The cathode material uses an array arrangement and has high electron emission efficiency. The X-ray source device uses the transmission target and has a smallsize and high X-ray generation efficiency.

The system comprises a supply system, a sampling system, a receiving system, a transmission pipeline system and a control system, the control system is electrically connected with the supply system, the transmission pipeline system, the sampling system and the receiving system, and the supply system is used for sending empty sample bottles according to the control of the control system; the conveying pipeline system is respectively connected with the supply system and the sampling system and is used for conveying the empty sample bottles to the sampling system according to the control of the control system, the sampling system is used for receiving the empty sample bottles and sampling according to the control of the control system to obtain the sample bottles and sending the sample bottles, and the conveying pipeline system is also connected with the receiving system. The conveying system is further used for conveying the sample bottles to the receiving system according to control of the control system; the receiving system is used for receiving the sample bottles according to control of the control system. The full-automatic sample taking and sending device can realize full-automatic sample taking and sending, reduces the misoperation risk of personnel, saves the sample taking and sending time, and can be suitable for sample taking and sending application of large factories.

The invention relates to the technical field of high intensity proton cyclotron beam commissioning devices, in particular to a beam commissioning target apparatus for a high intensity proton cyclotron. The high intensity proton cyclotron beam commissioning apparatus comprises a fixed stander, wherein the fixed stander is fixedly provided with a first fixed plate, a vacuum protection cover is arranged above the first fixed plate, the vacuum protection cover is provided with a beam passage, a commissioning target head is arranged in the vacuum protection cover, an air cylinder is fixedly arranged below the first fixed plate, an intermediate assembly is arranged between the air cylinder and the target head, when the air cylinder makes the extension movement, the intermediate assembly is driven to drive the target head to move upwardly, a terminal position of the target head is just located in the beam passage, when the air cylinder makes the retraction movement, the intermediate assemblyis driven to drive the target head to move downwardly to be away from the target head, and the beam passage is communicated, so that the beam commissioning target and an experimental terminal beam line share the same beam line, and the manpower cost and the resource cost can be greatly reduced.

The invention provides a device for receiving and sampling radioactive drugs. The device comprises a synthesizer (1), a pipeline A (2), a sterile filtration membrane A (3), a three-way valve A (4), a sampling syringe (5), a product receiving bottle (6), a pipeline B (7), a sterile filtration membrane B (8) and a three-way valve B (9), and is characterized in that the pipeline A (2) is connected to the synthesizer (1), the three-way valve A (4) is arranged on the pipeline A (2) and is connected with the sampling syringe (5), the other end of the pipeline A (2) is arranged in the product receiving bottle (6), the pipeline B (7) is also arranged in the product receiving bottle (6), the sterile filtration membrane B (8) and the three-way valve B (9) are connected to the pipeline B (7), and the three-way valve B (9) is positioned at the right end of the sterile filtration membrane B (8). By using the device disclosed by the invention, the operations of operators during production can be reduced, the radiation risk is reduced, and the contamination risks in product receiving and sampling processes are reduced.